Xquery Processing in Very Large XML Databases

XML is flexible and powerful tool that enables vital security in heterogeneous environments. The availability of large amounts of heterogeneous web data necessitates the integration of xml data from multiple xml sources. The authors need merge, or make an effort to service customers in cooperation; there is need for an integrated schema and query mechanism for the interoperability of application. An integrated global schema forms the basis for querying a set of local XML documents. This requires the identification and use of mapping rules and relationships between the local schemas.